This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 37 |
| 2 | 165 |
| 3 | 613 |
| 4 | 2085 |
| 5 | 6757 |
| 6 | 21285 |
| 7 | 65893 |
| 8 | 201765 |
| 9 | 613477 |
| 10 | 1856805 |
| 11 | 5603173 |
| 12 | 16875045 |
| 13 | 50756197 |
| 14 | 152530725 |
| 15 | 458116453 |
| 16 | 1375397925 |
| 17 | 4128290917 |
| 18 | 12389067045 |
| 19 | 37175589733 |
| 20 | 111543546405 |
| 21 | 334664193637 |
| 22 | 1004059689765 |
| 23 | 3012313287013 |
| 24 | 9037208296485 |
| 25 | 27112161760357 |